Photos: CES goes to the dogs

Several start-ups at this year’s CES tech show tackled the issue of food waste. According to the United Nations, about one-third of food is wasted globally, making the related carbon emissions to grow, ship and distribute that food all for naught.

As countries grapple with how to limit global warming and protect natural resources and biodiversity, more companies are growing their own commitments to building sustainable supply chains and slowing emissions.